Requestors arn't cleaned up
we had the problem on our development server, that Pega doesn't cleaning inactive requestors. See attached file. I found requestors, which are more than 1 month old, a couple of operators has more than one requestors.
Can anybody explain, what can be the reason for this behaviour? Is there a system setting or a agent to perform a clean up?
We are using Pega 7.1.9,
With best regards